Table 2.
Pathological characteristics of patients undergoing surgical resection for non–small cell lung cancer, by surgical procedure
| Characteristic | Group; no (%)* | p value† | |
|---|---|---|---|
| Lobectomy n = 351 |
Wedge resection n = 71 |
||
| Tumour size, mean, cm | 3.3 | 2.5 | 0.002 |
| T1a; AJCC seventh ed. | 96 (27.3) | 27 (38) | 0.007 |
| Stage IA; AJCC seventh ed. | 146 (41.5) | 35 (49.3) | 0.021 |
| Histology, no (%) | 0.44 | ||
| Adenocarcinoma | 230 (65.5) | 53 (74.6) | |
| Squamous cell | 94 (26.7) | 15 (21.1) | |
| Adenosquamous | 9 (2.6) | 0 | |
| Large cell | 12 (3.4) | 3 (4.2) | |
| Other | 5 (1.4) | 0 | |
| Tumour differentiation | 0.38 | ||
| Well | 46 (13.3) | 11 (16.2) | |
| Moderate | 134 (38.7) | 19 (27.9) | |
| Poor | 154 (44.5) | 36 (52.9) | |
| Undifferentiated | 12 (3.5) | 2 (2.9) | |
| Invasion present | |||
| Lymphatic | 87 (25.3) | 21 (30.4) | 0.38 |
| Vascular | 101 (29.4) | 18 (26.5) | 0.63 |
AJCC = American Joint Committee in Cancer.
*
Unless otherwise indicated.
†
All tests are χ2 other than tumour size, which was assessed using a t test.